:root {
  --bg: #f6f6f4; --fg: #1d1d1b; --muted: #5c5c58; --card: #fff; --line: #cfcfc8;
  --accent: #1f5fbf; --ok: #0a6b2d; --err: #b11d1d;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --fg: #ececea; --muted: #a3a39d; --card: #21211f; --line: #3a3a36; --accent: #7fb0ff; --ok: #5ed487; --err: #ff8a8a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); line-height: 1.5; }
a { color: var(--accent); }
.top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; max-width: 42rem; margin: 0 auto; padding: 1rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; color: var(--fg); }
nav { display: flex; gap: 1rem; }
nav a { text-decoration: none; padding-bottom: .1rem; border-bottom: 2px solid transparent; }
nav a[aria-current="page"] { border-bottom-color: var(--accent); }
main { max-width: 42rem; margin: 0 auto; padding: 1rem 1rem 2rem; }
h1 { margin: 1rem 0 .25rem; }
h2 { font-size: 1.05rem; margin: 0 0 .5rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 1rem; margin: 1rem 0; }
label { display: block; margin: .5rem 0 .25rem; font-size: .9rem; color: var(--muted); }
input, textarea, select { width: 100%; font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .5rem; }
textarea { font-family: ui-monospace, Menlo, monospace; font-size: .8rem; }
button { font: inherit; color: var(--fg); background: var(--card); border: 1px solid var(--fg); border-radius: 6px; padding: .45rem .9rem; margin-top: .5rem; cursor: pointer; }
button:disabled { opacity: .4; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.row { display: flex; gap: .5rem; flex-wrap: wrap; }
.row input { flex: 1; min-width: 10rem; }
.row button { margin-top: 0; }
ul.keys { list-style: none; padding: 0; margin: 0; }
ul.keys li { border: 1px solid var(--line); border-radius: 6px; padding: .75rem; margin-bottom: .75rem; }
ul.keys input { margin-top: .5rem; font-size: .8rem; }
ul.keys .row { margin-top: .5rem; }
code { word-break: break-all; font-size: .85rem; }
.ok { color: var(--ok); } .err { color: var(--err); }
.muted, .note { color: var(--muted); font-size: .85rem; }
.foot { max-width: 42rem; margin: 0 auto; padding: 1rem; color: var(--muted); font-size: .8rem; border-top: 1px solid var(--line); }
[hidden] { display: none !important; }